Abstract

Background Fibromyalgia (FM) is a prevalent musculoskeletal chronic pain condition. Obesity is frequent in patients with FM. Several studies suggests that body mass index (BMI) is related with pain intensity and quality of life.

Objectives 1) To determine the prevalence of obesity in a sample of women with FM. 2) To determine the relationship between obesity and the following variables: pain intensity, functionality, psychological distress, quality of life, and sleep problems.

Results The 30.9% (N=47) of the patients were normal weight, the 40.1% (N=61) overweight, and the remaining 28.9% (N=44) obese. Groups were homogeneous regarding to age. ANOVA analysis, with Bonferroni correction, showed no differences between groups in the assessed measures, except in pain intensity. Patients with obesity had more pain than patients with overweight (p<.01).

Conclusions 1) As already stated in previous studies, obesity was a frequent comorbid condition in patients with FM. 2) Patients with obesity had more pain than overweight patients. 3) Weight didn’t determine differences in the other studied variables.

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